Seriously, how is anyone dumb enough to be fat?

[Aractus]

I'm sorry... no naturally thin people? Really? I come from a family of large women. Most of them have C chests or more. They all struggle with their weight, and some are obsessive about it, to the point where the obsession is worse than the weight itself.

I am an anomaly in my family. I have a hard time putting on weight. My boobs are so small, there's not really a viable bra size for them. Beer makes up a very good majority of my caloric intake.

Well, if your diet is seriously deficient - eg ~600 calories per day from food, then it doesn't matter if you get 4,000 calories/day from sugar your body won't be able to build muscle or fat, plus you'll almost certainly develop osteoporosis. This is in fact why alcoholics can drink so much without gaining weight. I'd certainly suggest you speak to your doctor if I were you, or at the very least start increasing calories from food.